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Engineering field notes · 5 essays

Devlog — Technical Writings

In-depth engineering essays on architecture patterns, state management philosophies, design systems, and the thinking behind production-grade software.

Filter by Tag5 essays
Engineering logMulti-Tenancy
Engineering note · Multi-Tenancy

One Product, Hundreds of Restaurants

How Sofreh turns hostnames, verified domains, and scoped data access into a tenant boundary that is difficult to bypass by accident.

~3 min read
Engineering logConcurrency
Engineering note · Concurrency

The Last Payer Wins

Designing split-bill payments so duplicate clicks, concurrent callbacks, and delayed gateways cannot corrupt an order.

~3 min read
Engineering logReal-Time
Engineering note · Real-Time

Why the Kitchen Screen Uses SSE

A realtime pipeline designed for unreliable restaurant networks, one-way order flow, automatic recovery, and zero ghost listeners.

~2 min read
Engineering logDomain Logic
Engineering note · Domain Logic

Pricing After Midnight

Building a promotion engine where overlapping rules, overnight windows, and existing discounts always resolve to one explainable price.

~3 min read
Engineering logSaaS
Engineering note · SaaS

A Subscription Limit Is a Concurrency Problem

Why checking a plan before a write is not enough—and how Sofreh makes usage limits atomic without scattering billing logic everywhere.

~3 min read